MRK

Healthcare

Merck & Co., Inc.

$115.92+0.01 (+0.00%)

Prev Close

$115.91

Open

$116.92

High

$117.89

Low

$115.82

Volume

4.26M

Market Cap

$286.57B

P/E

15.90

Div Yield

0.03%

Over the past 12 months, insider activity at Merck & Co., Inc. (MRK) has been exclusively selling, with 0 insider purchases totaling $0.00 and 17 insider sales totaling $33.04M. The most recent insider transaction was by Guindo Chirfi (officer: Chief Marketing Officer), who sold $1.21M worth of shares on Feb 12, 2026. Merck & Co., Inc. operates in the Healthcare sector, within the Drug Manufacturers - General industry, with a market cap of $286.57B.

Buys (12M)

$0.00

Sells (12M)

$33.04M

Net Activity

Net Seller

$33.04M

Active Insiders

last 12 mo

MRK Price Chart

MRK Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 12, 2026↗	Guindo Chirfi	officer: Chief Marketing Officer	Sell	10,000	$121.46	$1.21M	60,615.1
Feb 10, 2026↗	Li Dean Y	officer: Executive VP & President, MRL	Sell	10,235	$117.52	$1.20M	92,035
Feb 9, 2026↗	Guindo Chirfi	officer: Chief Marketing Officer	Sell	10,000	$118.41	$1.18M	70,615.1
Feb 9, 2026↗	Zachary Jennifer	officer: EVP, General Counsel	Sell	38,835	$119.15	$4.63M	68,915.7
Feb 6, 2026↗	Davis Robert M	director, officer: Chairman, CEO & President	Sell	47,434	$118.04	$5.60M	476,064
Feb 6, 2026↗	DeLuca Richard R.	officer: EVP&Pres, Merck Animal Heallth	Sell	37,685	$120.92	$4.56M	160,174
Feb 6, 2026↗	Guindo Chirfi	officer: Chief Marketing Officer	Sell	20,000	$121.88	$2.44M	80,615.1
Feb 6, 2026↗	Li Dean Y	officer: Executive VP & President, MRL	Sell	15,087	$118.77	$1.79M	102,270
Feb 6, 2026↗	Litchfield Caroline	officer: EVP & CFO	Sell	41,997	$119.61	$5.02M	90,192.2
Feb 6, 2026↗	Oosthuizen Johannes Jacobus	officer: President, U.S. Market	Sell	15,000	$121.87	$1.83M	21,197.4
Feb 6, 2026↗	Smart Dalton E. III	officer: SVP Fin. - Global Controller	Sell	6,400	$119.68	$765.9K	10,604.8
Feb 6, 2026↗	Williams David Michael	officer: EVP,Chief Info&Digital Officer	Sell	5,000	$121.91	$609.5K	30,837.7
Nov 4, 2025↗	Williams David Michael	EVP,Chief Info&Digital Officer	Sell	8,614	$83.59	$720.0K	0
Aug 5, 2025↗	Williams David Michael	EVP,Chief Info&Digital Officer	Sell	8,432	$79.29	$668.6K	0
May 2, 2025↗	Larson Betty D	EVP, Chief HR Officer	Sell	5,153	$84.71	$436.5K	0
May 2, 2025↗	Smart Dalton E. III	SVP Fin. - Global Controller	Sell	290	$84.05	$24.4K	0
Apr 29, 2025↗	Smart Dalton E. III	SVP Fin. - Global Controller	Sell	4,262	$82.76	$352.7K	0
Feb 20, 2025↗	Oosthuizen Johannes Jacobus	President, U.S. Market	Sell	8,500	$84.09	$714.7K	0
Feb 11, 2025↗	Oosthuizen Johannes Jacobus	President, U.S. Market	Sell	6,404	$87.28	$558.9K	0
Feb 7, 2025↗	Downing Cristal N	Chief Comm. & Public Afrs Ofcr	Sell	2,361	$88.76	$209.6K	0

MRK Insider Buying Activity

The following table shows recent insider purchases of Merck & Co., Inc. (MRK) stock reported via SEC Form 4 filings.

No insider buying activity found for MRK in the last 12 months.

MRK Insider Selling Activity

The following table shows recent insider sales of Merck & Co., Inc. (MRK) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 12, 2026↗	Guindo Chirfi	officer: Chief Marketing Officer	Sell	10,000	$121.46	$1.21M	60,615.1
Feb 10, 2026↗	Li Dean Y	officer: Executive VP & President, MRL	Sell	10,235	$117.52	$1.20M	92,035
Feb 9, 2026↗	Guindo Chirfi	officer: Chief Marketing Officer	Sell	10,000	$118.41	$1.18M	70,615.1
Feb 9, 2026↗	Zachary Jennifer	officer: EVP, General Counsel	Sell	38,835	$119.15	$4.63M	68,915.7
Feb 6, 2026↗	Davis Robert M	director, officer: Chairman, CEO & President	Sell	47,434	$118.04	$5.60M	476,064
Feb 6, 2026↗	DeLuca Richard R.	officer: EVP&Pres, Merck Animal Heallth	Sell	37,685	$120.92	$4.56M	160,174
Feb 6, 2026↗	Guindo Chirfi	officer: Chief Marketing Officer	Sell	20,000	$121.88	$2.44M	80,615.1
Feb 6, 2026↗	Li Dean Y	officer: Executive VP & President, MRL	Sell	15,087	$118.77	$1.79M	102,270
Feb 6, 2026↗	Litchfield Caroline	officer: EVP & CFO	Sell	41,997	$119.61	$5.02M	90,192.2
Feb 6, 2026↗	Oosthuizen Johannes Jacobus	officer: President, U.S. Market	Sell	15,000	$121.87	$1.83M	21,197.4
Feb 6, 2026↗	Smart Dalton E. III	officer: SVP Fin. - Global Controller	Sell	6,400	$119.68	$765.9K	10,604.8
Feb 6, 2026↗	Williams David Michael	officer: EVP,Chief Info&Digital Officer	Sell	5,000	$121.91	$609.5K	30,837.7
Nov 4, 2025↗	Williams David Michael	EVP,Chief Info&Digital Officer	Sell	8,614	$83.59	$720.0K	0
Aug 5, 2025↗	Williams David Michael	EVP,Chief Info&Digital Officer	Sell	8,432	$79.29	$668.6K	0
May 2, 2025↗	Larson Betty D	EVP, Chief HR Officer	Sell	5,153	$84.71	$436.5K	0
May 2, 2025↗	Smart Dalton E. III	SVP Fin. - Global Controller	Sell	290	$84.05	$24.4K	0
Apr 29, 2025↗	Smart Dalton E. III	SVP Fin. - Global Controller	Sell	4,262	$82.76	$352.7K	0
Feb 20, 2025↗	Oosthuizen Johannes Jacobus	President, U.S. Market	Sell	8,500	$84.09	$714.7K	0
Feb 11, 2025↗	Oosthuizen Johannes Jacobus	President, U.S. Market	Sell	6,404	$87.28	$558.9K	0
Feb 7, 2025↗	Downing Cristal N	Chief Comm. & Public Afrs Ofcr	Sell	2,361	$88.76	$209.6K	0